Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between NPP and LANDSAT-9 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 10/9/2025
Index Date (NPP) Time (NPP) Lat,Lon (NPP) SZA (NPP ) Date (LANDSAT-9) Time (LANDSAT-9) Lat,Lon (LANDSAT-9) SZA (LANDSAT-9 ) Distance(km) Time Diff (sec)
1 10/09/2025 20:20:52 70.61,-128.95 77.10 10/09/2025 20:22:03 70.50,-128.43 77.00 22.71 71
2 10/09/2025 21:11:30 -70.28, 38.88 103.22 10/09/2025 21:11:35 -70.28, 38.88 103.22 0.21 5
3 10/09/2025 22:02:14 70.19,-153.66 76.71 10/09/2025 22:01:02 70.18,-153.62 76.70 1.74 72
4 10/12/2025 12:37:46 70.37, -12.81 77.87 10/12/2025 12:38:36 70.36, -12.76 77.86 2.30 50
5 10/12/2025 13:28:28 -70.25, 154.69 102.24 10/12/2025 13:28:06 -70.25, 154.72 102.24 0.86 22
6 10/12/2025 14:18:55 69.26, -36.52 76.79 10/12/2025 14:17:49 69.26, -39.00 76.79 97.78 66
7 10/15/2025 04:54:42 70.30, 103.07 78.80 10/15/2025 04:55:06 70.30, 103.03 78.80 1.61 24
8 10/15/2025 05:45:24 -70.18, -89.43 101.31 10/15/2025 05:44:36 -70.19, -89.49 101.30 2.59 48
9 10/17/2025 20:20:57 -70.43, 51.32 100.10 10/17/2025 20:22:08 -70.43, 51.46 100.11 5.14 71
10 10/17/2025 21:11:40 70.29,-141.15 79.78 10/17/2025 21:11:36 70.26,-141.14 79.74 3.56 4
11 10/17/2025 22:02:20 -70.07, 26.52 100.44 10/17/2025 22:01:07 -70.11, 26.27 100.41 10.42 73
12 10/20/2025 12:37:54 -70.38, 167.17 99.19 10/20/2025 12:38:38 -70.37, 167.25 99.20 3.15 44
13 10/20/2025 13:28:37 70.24, -25.30 80.69 10/20/2025 13:28:05 70.25, -25.27 80.70 1.71 32

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/9/2025
SNOs_Map_NPP_LANDSAT-9_20251009.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 10/09/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9